91 lines
3.6 KiB
Python
91 lines
3.6 KiB
Python
import json
|
|
|
|
from django.contrib.gis.geos import LinearRing, Point, Polygon
|
|
from django.core import serializers
|
|
from django.test import TestCase
|
|
|
|
from .models import City, MultiFields, PennsylvaniaCity
|
|
|
|
|
|
class GeoJSONSerializerTests(TestCase):
|
|
fixtures = ['initial']
|
|
|
|
def test_builtin_serializers(self):
|
|
"""
|
|
'geojson' should be listed in available serializers.
|
|
"""
|
|
all_formats = set(serializers.get_serializer_formats())
|
|
public_formats = set(serializers.get_public_serializer_formats())
|
|
|
|
self.assertIn('geojson', all_formats),
|
|
self.assertIn('geojson', public_formats)
|
|
|
|
def test_serialization_base(self):
|
|
geojson = serializers.serialize('geojson', City.objects.all().order_by('name'))
|
|
geodata = json.loads(geojson)
|
|
self.assertEqual(len(geodata['features']), len(City.objects.all()))
|
|
self.assertEqual(geodata['features'][0]['geometry']['type'], 'Point')
|
|
self.assertEqual(geodata['features'][0]['properties']['name'], 'Chicago')
|
|
first_city = City.objects.all().order_by('name').first()
|
|
self.assertEqual(geodata['features'][0]['properties']['pk'], str(first_city.pk))
|
|
|
|
def test_geometry_field_option(self):
|
|
"""
|
|
When a model has several geometry fields, the 'geometry_field' option
|
|
can be used to specify the field to use as the 'geometry' key.
|
|
"""
|
|
MultiFields.objects.create(
|
|
city=City.objects.first(), name='Name', point=Point(5, 23),
|
|
poly=Polygon(LinearRing((0, 0), (0, 5), (5, 5), (5, 0), (0, 0))))
|
|
|
|
geojson = serializers.serialize('geojson', MultiFields.objects.all())
|
|
geodata = json.loads(geojson)
|
|
self.assertEqual(geodata['features'][0]['geometry']['type'], 'Point')
|
|
|
|
geojson = serializers.serialize(
|
|
'geojson',
|
|
MultiFields.objects.all(),
|
|
geometry_field='poly'
|
|
)
|
|
geodata = json.loads(geojson)
|
|
self.assertEqual(geodata['features'][0]['geometry']['type'], 'Polygon')
|
|
|
|
# geometry_field is considered even if not in fields (#26138).
|
|
geojson = serializers.serialize(
|
|
'geojson',
|
|
MultiFields.objects.all(),
|
|
geometry_field='poly',
|
|
fields=('city',)
|
|
)
|
|
geodata = json.loads(geojson)
|
|
self.assertEqual(geodata['features'][0]['geometry']['type'], 'Polygon')
|
|
|
|
def test_fields_option(self):
|
|
"""
|
|
The fields option allows to define a subset of fields to be present in
|
|
the 'properties' of the generated output.
|
|
"""
|
|
PennsylvaniaCity.objects.create(name='Mansfield', county='Tioga', point='POINT(-77.071445 41.823881)')
|
|
geojson = serializers.serialize(
|
|
'geojson', PennsylvaniaCity.objects.all(), fields=('county', 'point'),
|
|
)
|
|
geodata = json.loads(geojson)
|
|
self.assertIn('county', geodata['features'][0]['properties'])
|
|
self.assertNotIn('founded', geodata['features'][0]['properties'])
|
|
self.assertNotIn('pk', geodata['features'][0]['properties'])
|
|
|
|
def test_srid_option(self):
|
|
geojson = serializers.serialize('geojson', City.objects.all().order_by('name'), srid=2847)
|
|
geodata = json.loads(geojson)
|
|
self.assertEqual(
|
|
[int(c) for c in geodata['features'][0]['geometry']['coordinates']],
|
|
[1564802, 5613214]
|
|
)
|
|
|
|
def test_deserialization_exception(self):
|
|
"""
|
|
GeoJSON cannot be deserialized.
|
|
"""
|
|
with self.assertRaises(serializers.base.SerializerDoesNotExist):
|
|
serializers.deserialize('geojson', '{}')
|